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Preparation of UV-protective kefiran/nano-ZnO nanocomposites: physical and mechanical properties.
Int J Biol Macromol. 2015 Jan; 72:41-6.IJ

Abstract

In this study, we investigated the effect of ZnO nanoparticles (ZN) as a UV-protective agent of kefiran biopolymers. Our results showed that with increasing ZN content, the tensile strength, elongation at break, and tensile energy to break the kefiran film and nanocomposites also increased. Kefiran nanocomposites with a ZN content higher than 2% produced a UV-protective film with good visual properties, low sensibility to water, and low water-vapor permeability. The thermal properties of all specimens, analyzed by DSC, showed that the ZN content had a negative effect on Tg and a positive effect on nanocomposites' melting point. TEM, SEM micrography and XRD spectrum analysis confirmed the hypothesis that ZNs act like a ball bearing, making movement of kefiran chains easier and increasing elongation at break, while simultaneously decreasing the Tg of kefiran nanocomposites.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Shahabi-Ghahfarrokhi I
Department of Food Science and Engineering, Campus of Agriculture and Natural Resources, University of Tehran, P.O. Box 4111, Karaj, Iran.
Khodaiyan F
Bioprocessing and Biodetection Laboratory, Department of Food Science and Engineering, Campus of Agriculture and Natural Resources, University of Tehran, P.O. Box 4111, Karaj, Iran. Electronic address: khodaiyan@ut.ac.ir.
Mousavi M
Department of Food Science and Engineering, Campus of Agriculture and Natural Resources, University of Tehran, P.O. Box 4111, Karaj, Iran.
Yousefi H
Department of Wood Engineering and Technology, Gorgan University of Agricultural Sciences and Natural Resources, 4913815739 Gorgan, Iran.

MeSH

Absorption, PhysicochemicalCalorimetry, Differential ScanningColorHumidityMechanical PhenomenaNanocompositesPermeabilityPhysical PhenomenaPolysaccharidesSolubilitySpectrophotometry, UltravioletSteamUltraviolet RaysWaterX-Ray DiffractionZinc Oxide

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25108056

Citation

Shahabi-Ghahfarrokhi, Iman, et al. "Preparation of UV-protective kefiran/nano-ZnO Nanocomposites: Physical and Mechanical Properties." International Journal of Biological Macromolecules, vol. 72, 2015, pp. 41-6.
Shahabi-Ghahfarrokhi I, Khodaiyan F, Mousavi M, et al. Preparation of UV-protective kefiran/nano-ZnO nanocomposites: physical and mechanical properties. Int J Biol Macromol. 2015;72:41-6.
Shahabi-Ghahfarrokhi, I., Khodaiyan, F., Mousavi, M., & Yousefi, H. (2015). Preparation of UV-protective kefiran/nano-ZnO nanocomposites: physical and mechanical properties. International Journal of Biological Macromolecules, 72, 41-6. https://doi.org/10.1016/j.ijbiomac.2014.07.047
Shahabi-Ghahfarrokhi I, et al. Preparation of UV-protective kefiran/nano-ZnO Nanocomposites: Physical and Mechanical Properties. Int J Biol Macromol. 2015;72:41-6. PubMed PMID: 25108056.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Preparation of UV-protective kefiran/nano-ZnO nanocomposites: physical and mechanical properties. AU - Shahabi-Ghahfarrokhi,Iman, AU - Khodaiyan,Faramarz, AU - Mousavi,Mohammad, AU - Yousefi,Hossein, Y1 - 2014/08/06/ PY - 2013/11/25/received PY - 2014/07/19/revised PY - 2014/07/22/accepted PY - 2014/8/10/entrez PY - 2014/8/12/pubmed PY - 2015/8/15/medline KW - Film KW - Kefiran KW - Mechanical properties KW - Nano-ZnO KW - Nanocomposite KW - UV-protective SP - 41 EP - 6 JF - International journal of biological macromolecules JO - Int J Biol Macromol VL - 72 N2 - In this study, we investigated the effect of ZnO nanoparticles (ZN) as a UV-protective agent of kefiran biopolymers. Our results showed that with increasing ZN content, the tensile strength, elongation at break, and tensile energy to break the kefiran film and nanocomposites also increased. Kefiran nanocomposites with a ZN content higher than 2% produced a UV-protective film with good visual properties, low sensibility to water, and low water-vapor permeability. The thermal properties of all specimens, analyzed by DSC, showed that the ZN content had a negative effect on Tg and a positive effect on nanocomposites' melting point. TEM, SEM micrography and XRD spectrum analysis confirmed the hypothesis that ZNs act like a ball bearing, making movement of kefiran chains easier and increasing elongation at break, while simultaneously decreasing the Tg of kefiran nanocomposites. SN - 1879-0003 UR - https://www.unboundmedicine.com/medline/citation/25108056/Preparation_of_UV_protective_kefiran/nano_ZnO_nanocomposites:_physical_and_mechanical_properties_ DB - PRIME DP - Unbound Medicine ER -